求翻译,she had never been very functional before nine and at least one cup of tea
题目
求翻译,she had never been very functional before nine and at least one cup of tea
答案
在9点之前她总是不能集中精神工作,最少要喝一杯茶.
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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